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Message-Id: <20240229-8ulp_edma-v2-4-9d12f883c8f7@nxp.com>
Date: Thu, 29 Feb 2024 15:58:10 -0500
From: Frank Li <Frank.Li@....com>
To: Vinod Koul <vkoul@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, Peng Fan <peng.fan@....com>
Cc: imx@...ts.linux.dev, dmaengine@...r.kernel.org, 
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 Frank Li <Frank.Li@....com>, Joy Zou <joy.zou@....com>
Subject: [PATCH v2 4/5] dt-bindings: dma: fsl-edma: add fsl,imx8ulp-edma
 compatible string

From: Joy Zou <joy.zou@....com>

Introduce the compatible string 'fsl,imx8ulp-edma' to enable support for
the i.MX8ULP's eDMA, alongside adjusting the clock numbering. The i.MX8ULP
eDMA architecture features one clock for each DMA channel and an additional
clock for the core controller. Given a maximum of 32 DMA channels, the
maximum clock number consequently increases to 33.

Signed-off-by: Joy Zou <joy.zou@....com>
Signed-off-by: Frank Li <Frank.Li@....com>
---
 .../devicetree/bindings/dma/fsl,edma.yaml          | 26 ++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/dma/fsl,edma.yaml b/Documentation/devicetree/bindings/dma/fsl,edma.yaml
index aa51d278cb67b..55cce79c759f8 100644
--- a/Documentation/devicetree/bindings/dma/fsl,edma.yaml
+++ b/Documentation/devicetree/bindings/dma/fsl,edma.yaml
@@ -23,6 +23,7 @@ properties:
           - fsl,imx7ulp-edma
           - fsl,imx8qm-adma
           - fsl,imx8qm-edma
+          - fsl,imx8ulp-edma
           - fsl,imx93-edma3
           - fsl,imx93-edma4
           - fsl,imx95-edma5
@@ -53,11 +54,11 @@ properties:
 
   clocks:
     minItems: 1
-    maxItems: 2
+    maxItems: 33
 
   clock-names:
     minItems: 1
-    maxItems: 2
+    maxItems: 33
 
   big-endian:
     description: |
@@ -108,6 +109,7 @@ allOf:
       properties:
         clocks:
           minItems: 2
+          maxItems: 2
         clock-names:
           items:
             - const: dmamux0
@@ -136,6 +138,7 @@ allOf:
       properties:
         clock:
           minItems: 2
+          maxItems: 2
         clock-names:
           items:
             - const: dma
@@ -151,6 +154,25 @@ allOf:
         dma-channels:
           const: 32
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: fsl,imx8ulp-edma
+    then:
+      properties:
+        clock:
+          maxItems: 33
+        clock-names:
+          items:
+            - const: dma
+            - pattern: "^CH[0-31]-clk$"
+        interrupt-names: false
+        interrupts:
+          maxItems: 32
+        "#dma-cells":
+          const: 3
+
 unevaluatedProperties: false
 
 examples:

-- 
2.34.1


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